Effect of pH variation on citrate nitrate sol-gels obtained from auto-combustion method: Synthesis, calculations and characterisations of extremely dense BaZrO3 ceramic
We report the formation of phase pure, uniform, nano-sized and extremely dense BaZrO3 ceramic employing the sol-gel auto-combustion synthesis technique by fixing the metal to citrate ratio as 1.5 and systematically varying the pH of the gel. The details of the species that were formed during the gel...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Open Ceramics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666539522000864 |
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| author | Ashna Babu Dumpala Tirumalarao Sayan Das Viney Dixit S.P. Sruthy Vinesh Vijayan D. Jaiswal-Nagar |
| author_facet | Ashna Babu Dumpala Tirumalarao Sayan Das Viney Dixit S.P. Sruthy Vinesh Vijayan D. Jaiswal-Nagar |
| author_sort | Ashna Babu |
| collection | DOAJ |
| description | We report the formation of phase pure, uniform, nano-sized and extremely dense BaZrO3 ceramic employing the sol-gel auto-combustion synthesis technique by fixing the metal to citrate ratio as 1.5 and systematically varying the pH of the gel. The details of the species that were formed during the gel stage were investigated by calculating the pH variation of the relative concentration of the barium and zirconium citrate species whose presence was indicated in solid-state NMR spectra that displayed extra resonance lines. Sintered density of the pellet obtained at a sintering temperature of 1550°C was found to be the highest for pH = 1 pellet, indicating that the gel structure for this pH was the most homogeneous which resulted in the formation of numerous sites of the resultant BaZrO3 ceramic that are evenly dispersed without agglomeration. The obtained percentage density was 99.9%, the highest ever-reported density of BaZrO3 ceramic by any technique. |
| first_indexed | 2024-04-11T15:16:52Z |
| format | Article |
| id | doaj.art-45e538fe8198401aaffb0034c3b96d0e |
| institution | Directory Open Access Journal |
| issn | 2666-5395 |
| language | English |
| last_indexed | 2024-04-11T15:16:52Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Open Ceramics |
| spelling | doaj.art-45e538fe8198401aaffb0034c3b96d0e2022-12-22T04:16:28ZengElsevierOpen Ceramics2666-53952022-12-0112100303Effect of pH variation on citrate nitrate sol-gels obtained from auto-combustion method: Synthesis, calculations and characterisations of extremely dense BaZrO3 ceramicAshna Babu0Dumpala Tirumalarao1Sayan Das2Viney Dixit3S.P. Sruthy4Vinesh Vijayan5D. Jaiswal-Nagar6School of Physics, IISER Thiruvananthapuram, Vithura, Kerala, 695551, IndiaSchool of Physics, IISER Thiruvananthapuram, Vithura, Kerala, 695551, IndiaSchool of Chemistry, IISER Thiruvananthapuram, Vithura, Kerala, 695551, IndiaSchool of Physics, IISER Thiruvananthapuram, Vithura, Kerala, 695551, IndiaSchool of Physics, IISER Thiruvananthapuram, Vithura, Kerala, 695551, IndiaSchool of Chemistry, IISER Thiruvananthapuram, Vithura, Kerala, 695551, IndiaSchool of Physics, IISER Thiruvananthapuram, Vithura, Kerala, 695551, India; Corresponding author.We report the formation of phase pure, uniform, nano-sized and extremely dense BaZrO3 ceramic employing the sol-gel auto-combustion synthesis technique by fixing the metal to citrate ratio as 1.5 and systematically varying the pH of the gel. The details of the species that were formed during the gel stage were investigated by calculating the pH variation of the relative concentration of the barium and zirconium citrate species whose presence was indicated in solid-state NMR spectra that displayed extra resonance lines. Sintered density of the pellet obtained at a sintering temperature of 1550°C was found to be the highest for pH = 1 pellet, indicating that the gel structure for this pH was the most homogeneous which resulted in the formation of numerous sites of the resultant BaZrO3 ceramic that are evenly dispersed without agglomeration. The obtained percentage density was 99.9%, the highest ever-reported density of BaZrO3 ceramic by any technique.http://www.sciencedirect.com/science/article/pii/S2666539522000864Citrate-nitrate auto-combustionpH variation calculationSolid state NMRSintering stage microstructuresDensity |
| spellingShingle | Ashna Babu Dumpala Tirumalarao Sayan Das Viney Dixit S.P. Sruthy Vinesh Vijayan D. Jaiswal-Nagar Effect of pH variation on citrate nitrate sol-gels obtained from auto-combustion method: Synthesis, calculations and characterisations of extremely dense BaZrO3 ceramic Open Ceramics Citrate-nitrate auto-combustion pH variation calculation Solid state NMR Sintering stage microstructures Density |
| title | Effect of pH variation on citrate nitrate sol-gels obtained from auto-combustion method: Synthesis, calculations and characterisations of extremely dense BaZrO3 ceramic |
| title_full | Effect of pH variation on citrate nitrate sol-gels obtained from auto-combustion method: Synthesis, calculations and characterisations of extremely dense BaZrO3 ceramic |
| title_fullStr | Effect of pH variation on citrate nitrate sol-gels obtained from auto-combustion method: Synthesis, calculations and characterisations of extremely dense BaZrO3 ceramic |
| title_full_unstemmed | Effect of pH variation on citrate nitrate sol-gels obtained from auto-combustion method: Synthesis, calculations and characterisations of extremely dense BaZrO3 ceramic |
| title_short | Effect of pH variation on citrate nitrate sol-gels obtained from auto-combustion method: Synthesis, calculations and characterisations of extremely dense BaZrO3 ceramic |
| title_sort | effect of ph variation on citrate nitrate sol gels obtained from auto combustion method synthesis calculations and characterisations of extremely dense bazro3 ceramic |
| topic | Citrate-nitrate auto-combustion pH variation calculation Solid state NMR Sintering stage microstructures Density |
| url | http://www.sciencedirect.com/science/article/pii/S2666539522000864 |
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